Half to franklin hoyt



(No'ModeL A. J. H-OYT.

- ELECTRIC PUSH BUTTON.

vN0. 394,925. Patented Dec. 18, 1888.

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'Wbbwsses fiwardor 6 all/MW find/raw Lfjioyi" UNITED STATES PATENT OFFicE.

ANDREIV J. I-IOYT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- IIALF TO FRANKLIN I IOYT, OF SAME PLACE.

ELECTRIC PUSH-BUTTON.

SPECIFICATION forming part of Letters Patent No. 394,925, dated December 18, 1888.

Application filed May 17,1888. Serial No. 274,144. (No model.)

T (0 whom it may concern: pressed. (See Fig. 2.) Just before the but- Be it known that I, ANDREW J. IIOYT, a cititon reaches the limit of its inward movement, zen of the United States, and a resident of however, the short arm of the lever (1 passes Philadelphia, Pennsylvania, have invented the center of the rounded upper end of the 55 5 certain Improvements in Electric Push-Butterminal a, and said lever is therefore, owing tons, of which the following is a specification. to the elasticity of said terminal, caused to The object of my invention is to so 0011- swing upon its pivot, as shown in Fig. 3, so struct an electric push-button that the signal that the long arm of the lever is lifted from will be given only when the button is being contact with the terminal 1 The insulating- 6o 10 depressed, the signal ceasing when the butblock D is now interposed between the two ton has reached the limit of its inward moveterminals; hence the circuit is broken and ment and failing to sound on the backward there will be no sounding of the signal durmovement of the button. This object I ating the time that the button F is held in the tain in the manner hereinafter set forth, refdepressed position, nor will there be any I 5 erence being had to the accompanying drawsounding of the signal while the button is ings, in which-- moving outward to its normal position, for Figures 1, 2, 3, and 4 are sectional views of during this movement the short arm of the an electric push-button embodying my invenlever (z is under control of the .rounded end tion, the movable parts being in different poof the spring-terminal, 00, and the long arm of 2o sitions in the different views. Fig. 5 is a persaid lever is thereby held in the elevated pospective view of the device with the inclosing sition shown in Fig. 4, a pin, 1), on the block cap or cover removed, and Fig. l; is a sectional D serving to limit the upward movement of view illustrating a modification of the inventhis portion of the finger. Just before the tion. button F reaches the limit of its oi'ltward 25 In the push-button shown in Figs. 1 to 5, A movement, however, the short arm of the lerepresents the base, and and y the opposite ver (1 passes from under the control of the terminals of an electric circuit, these termirounded end of the terminal w and said lever nals being properly secured to the base and swings on its pivot, the long arm of the lever connected to the positive and negative wires dropping into contact with the terminal y, so 30 of the battery or other generator of electricthat the parts are again in position to comity. The terminal is in the form of aspringplete the circuit on depressing the button. finger having a rounded upper end, no, this The interposition of the insulating-block finger projecting above the base and into the between the terminals on the completion of chamber within an inclosing cap or cover, B. the movement of the button and the main- 35 The terminal y forms part of a spring, y, tenance of this block between the terminals which carries a block, I), of insulating mateon the return movement are the main features rial, and upon the latter bears the button F, of my invention, and. this may be effected in which projects through an opening in the cap different ways. For instance, in Fig. (i I have or cover B. Hung to one side of the block D shown a modified form of push-button em- 0 40 is a lever, a, the long arm of which when the bodying myinvention. In this case the stem block is in its elevated or normal position, as a of the push-button itself forms the connecshown in Fig. 1, bears upon the terminal y, tion between the terminals, this stem sliding the short arm of the lever being free from in the terminal 00 and having a conical head, contact with the terminal 03. lVhen the butd, and a collar, f, between which is interposed 45 ton F is pushed inward, however, the block a sliding block, I), of insulating material. 1 D is depressed and the short arm of the lever Vhen the button F is first depressed, therea is brought into contact with the terminal fore, the conical head (1 comes in contact with w, so as to make connection between the two the terminal y and completes the circuit; but terminals, complete the circuit, and effect the as the movement of the button is continued 50 sounding of the alarm, the circuit being closed the collar f on the stem strikes the block D during the time that the button is being tie and pushes the same forward over the terminal y, so as to break the circuit, and on the return movement of the button the head dot the stem first enters a socket in the block D and then causes the retraction of the latter, so that there is no contact between said head and the terminal 1/ on the return movement. The main distinction between this device and that shown in Figs. 1 to 5, it will be noticed, is that whereas in the latter the contact-piece is hung to and movable on the insulatingblock in the modified device the insulatingblock is carried by and movable on the contact-piece, which in this case is the stem of the button.

Having thus described m y invention, what I claim, and desire to secure by Leti ers Patent, is

1. The combination, in. an electric pushbutton, of the terminals, the contact-piece normally out of contact with one of the terminals, but brought into contact therewith on the depression of the button, and an insulating-block movable with said contact-Idem and interposed in the electric path between the terminals on the depression of the button,all substantially as specified.

2. The combination, in an electric pushbutton, of the terminals, the contact-piece, and an insulating block movable with said contact-piece and interposed in the electric path between the terminals on the depression of the button, said contact-piece.being also free to move il'idependently of the insulating block, all substantially as specified.

3. The combination of the terminals with the push -bntton and an insulating-block acted on thereby and carrying a pix'oted contact-lever, all substal'itially as specified.

4. The combination of the terminals, the push-button, and the spring-supported insulatii'ig-block carrying the pivoted contact-lever, and having a stop-pin for restricting the swingingmovement of said lever, all sul )stantially as specified.

In testimony whereo t' I have signed my name to this specification in the presence of two subscribing witnesses.

ANDREW J. llOY'l.

\V itnesses:

WILLIAM 1). Cessna, HARRY Snrrn. 

